A 7-zone sediment filter with activated carbon is a multi-stage water filter which, by combining different filter materials, removes a wide range of contaminants from the water. Each zone is specifically designed to remove certain contaminants in order to optimise water quality. Here is a typical design of such a filter:

Structure of a 7-zone sediment filter with activated carbon

1. Pre-filter (sediment filter):

   • Material: Fine-pored polypropylene or another mechanical filter material.
   • Function: Removes larger particles such as sand, rust, silt and other sediments that cloud the water.

2. Activated carbon granules (Zone 1):

   • Material: Activated carbon made from coconut shells or coal.
   • Function: Adsorbs chlorine, pesticides, organic compounds and substances responsible for unpleasant tastes and odours.

3. Ion-exchange resin (Zone 2):

   • Material: Resin with cation and anion exchange capacity.
   • Function: Reduces dissolved heavy metals such as lead, copper and arsenic, and reduces water hardness by removing calcium and magnesium ions.

4. Fine-pored activated carbon block material (Zone 3):

   • Material: Compacted activated carbon material.
   • Function: Adsorbs minor contaminants such as residual chlorine and other dissolved organic substances.

5. Mineralisation zone (Zone 4):

   • Material: Mineral stones or ceramic beads.
   • Function: Enriches the water with beneficial minerals such as calcium, magnesium and potassium to improve the taste and raise the pH level.

6. Silver-coated activated carbon granules (Zone 5):

   • Material: Activated carbon with silver ions.
   • Function: Inhibits the growth of bacteria and microorganisms in the filter.

7. Fine filtration (Zone 6 and Zone 7):

   • Zone 6: A fine particle filter removes microscopic particles such as microplastics.
   • Zone 7: A final layer of ceramic or membrane filter material ensures that the water is clear and free from any remaining impurities.

Additional features

• Multi-stage adsorption: Each zone performs a specific task to thoroughly purify the water.
• Increased durability: The sediment layer protects the internal filter zones from clogging.
• Ionisation and alkalisation: The mineralisation zone makes the water alkaline (increases the pH).

How it works

1. Initial stage: The raw water first passes through the sediment filter, which removes larger particles.
2. Activated carbon layers: Chlorine, VOCs, pesticides and organic compounds are adsorbed.
3. Ion exchange: Heavy metals and excess hardness are reduced.
4. Mineralisation: Beneficial minerals are added, which raise the pH and make the water alkaline.
5. Fine filtration: Tiny particles and any remaining impurities are removed.

Benefits of a 7-zone filter with activated carbon

• Comprehensive purification: Removes sediments, chemicals, microorganisms and heavy metals.
• Improved taste: Removes substances that cause unpleasant odours and tastes.
• Health benefits: Adds minerals and produces alkaline water.
• Durability: The multi-layered structure extends the filter’s service life.